1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright 2018 NXP 4 * Dong Aisheng <aisheng.dong@nxp.com> 5 */ 6 7 #include <linux/clk-provider.h> 8 #include <linux/err.h> 9 #include <linux/io.h> 10 #include <linux/module.h> 11 #include <linux/of.h> 12 #include <linux/of_address.h> 13 #include <linux/of_device.h> 14 #include <linux/platform_device.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/slab.h> 17 18 #include "clk-scu.h" 19 #include "clk-imx8qxp-lpcg.h" 20 21 #include <dt-bindings/clock/imx8-clock.h> 22 23 /* 24 * struct imx8qxp_lpcg_data - Description of one LPCG clock 25 * @id: clock ID 26 * @name: clock name 27 * @parent: parent clock name 28 * @flags: common clock flags 29 * @offset: offset of this LPCG clock 30 * @bit_idx: bit index of this LPCG clock 31 * @hw_gate: whether supports HW autogate 32 * 33 * This structure describes one LPCG clock 34 */ 35 struct imx8qxp_lpcg_data { 36 int id; 37 char *name; 38 char *parent; 39 unsigned long flags; 40 u32 offset; 41 u8 bit_idx; 42 bool hw_gate; 43 }; 44 45 /* 46 * struct imx8qxp_ss_lpcg - Description of one subsystem LPCG clocks 47 * @lpcg: LPCG clocks array of one subsystem 48 * @num_lpcg: the number of LPCG clocks 49 * @num_max: the maximum number of LPCG clocks 50 * 51 * This structure describes each subsystem LPCG clocks information 52 * which then will be used to create respective LPCGs clocks 53 */ 54 struct imx8qxp_ss_lpcg { 55 const struct imx8qxp_lpcg_data *lpcg; 56 u8 num_lpcg; 57 u8 num_max; 58 }; 59 60 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_adma[] = { 61 { IMX_ADMA_LPCG_UART0_IPG_CLK, "uart0_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_0_LPCG, 16, 0, }, 62 { IMX_ADMA_LPCG_UART0_BAUD_CLK, "uart0_lpcg_baud_clk", "uart0_clk", 0, ADMA_LPUART_0_LPCG, 0, 0, }, 63 { IMX_ADMA_LPCG_UART1_IPG_CLK, "uart1_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_1_LPCG, 16, 0, }, 64 { IMX_ADMA_LPCG_UART1_BAUD_CLK, "uart1_lpcg_baud_clk", "uart1_clk", 0, ADMA_LPUART_1_LPCG, 0, 0, }, 65 { IMX_ADMA_LPCG_UART2_IPG_CLK, "uart2_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_2_LPCG, 16, 0, }, 66 { IMX_ADMA_LPCG_UART2_BAUD_CLK, "uart2_lpcg_baud_clk", "uart2_clk", 0, ADMA_LPUART_2_LPCG, 0, 0, }, 67 { IMX_ADMA_LPCG_UART3_IPG_CLK, "uart3_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPUART_3_LPCG, 16, 0, }, 68 { IMX_ADMA_LPCG_UART3_BAUD_CLK, "uart3_lpcg_baud_clk", "uart3_clk", 0, ADMA_LPUART_3_LPCG, 0, 0, }, 69 { IMX_ADMA_LPCG_I2C0_IPG_CLK, "i2c0_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_0_LPCG, 16, 0, }, 70 { IMX_ADMA_LPCG_I2C0_CLK, "i2c0_lpcg_clk", "i2c0_clk", 0, ADMA_LPI2C_0_LPCG, 0, 0, }, 71 { IMX_ADMA_LPCG_I2C1_IPG_CLK, "i2c1_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_1_LPCG, 16, 0, }, 72 { IMX_ADMA_LPCG_I2C1_CLK, "i2c1_lpcg_clk", "i2c1_clk", 0, ADMA_LPI2C_1_LPCG, 0, 0, }, 73 { IMX_ADMA_LPCG_I2C2_IPG_CLK, "i2c2_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_2_LPCG, 16, 0, }, 74 { IMX_ADMA_LPCG_I2C2_CLK, "i2c2_lpcg_clk", "i2c2_clk", 0, ADMA_LPI2C_2_LPCG, 0, 0, }, 75 { IMX_ADMA_LPCG_I2C3_IPG_CLK, "i2c3_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_LPI2C_3_LPCG, 16, 0, }, 76 { IMX_ADMA_LPCG_I2C3_CLK, "i2c3_lpcg_clk", "i2c3_clk", 0, ADMA_LPI2C_3_LPCG, 0, 0, }, 77 78 { IMX_ADMA_LPCG_DSP_CORE_CLK, "dsp_lpcg_core_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 28, 0, }, 79 { IMX_ADMA_LPCG_DSP_IPG_CLK, "dsp_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 20, 0, }, 80 { IMX_ADMA_LPCG_DSP_ADB_CLK, "dsp_lpcg_adb_clk", "dma_ipg_clk_root", 0, ADMA_HIFI_LPCG, 16, 0, }, 81 { IMX_ADMA_LPCG_OCRAM_IPG_CLK, "ocram_lpcg_ipg_clk", "dma_ipg_clk_root", 0, ADMA_OCRAM_LPCG, 16, 0, }, 82 }; 83 84 static const struct imx8qxp_ss_lpcg imx8qxp_ss_adma = { 85 .lpcg = imx8qxp_lpcg_adma, 86 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_adma), 87 .num_max = IMX_ADMA_LPCG_CLK_END, 88 }; 89 90 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_conn[] = { 91 { IMX_CONN_LPCG_SDHC0_PER_CLK, "sdhc0_lpcg_per_clk", "sdhc0_clk", 0, CONN_USDHC_0_LPCG, 0, 0, }, 92 { IMX_CONN_LPCG_SDHC0_IPG_CLK, "sdhc0_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_0_LPCG, 16, 0, }, 93 { IMX_CONN_LPCG_SDHC0_HCLK, "sdhc0_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_0_LPCG, 20, 0, }, 94 { IMX_CONN_LPCG_SDHC1_PER_CLK, "sdhc1_lpcg_per_clk", "sdhc1_clk", 0, CONN_USDHC_1_LPCG, 0, 0, }, 95 { IMX_CONN_LPCG_SDHC1_IPG_CLK, "sdhc1_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_1_LPCG, 16, 0, }, 96 { IMX_CONN_LPCG_SDHC1_HCLK, "sdhc1_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_1_LPCG, 20, 0, }, 97 { IMX_CONN_LPCG_SDHC2_PER_CLK, "sdhc2_lpcg_per_clk", "sdhc2_clk", 0, CONN_USDHC_2_LPCG, 0, 0, }, 98 { IMX_CONN_LPCG_SDHC2_IPG_CLK, "sdhc2_lpcg_ipg_clk", "conn_ipg_clk_root", 0, CONN_USDHC_2_LPCG, 16, 0, }, 99 { IMX_CONN_LPCG_SDHC2_HCLK, "sdhc2_lpcg_ahb_clk", "conn_axi_clk_root", 0, CONN_USDHC_2_LPCG, 20, 0, }, 100 { IMX_CONN_LPCG_ENET0_ROOT_CLK, "enet0_ipg_root_clk", "enet0_clk", 0, CONN_ENET_0_LPCG, 0, 0, }, 101 { IMX_CONN_LPCG_ENET0_TX_CLK, "enet0_tx_clk", "enet0_clk", 0, CONN_ENET_0_LPCG, 4, 0, }, 102 { IMX_CONN_LPCG_ENET0_AHB_CLK, "enet0_ahb_clk", "conn_axi_clk_root", 0, CONN_ENET_0_LPCG, 8, 0, }, 103 { IMX_CONN_LPCG_ENET0_IPG_S_CLK, "enet0_ipg_s_clk", "conn_ipg_clk_root", 0, CONN_ENET_0_LPCG, 20, 0, }, 104 { IMX_CONN_LPCG_ENET0_IPG_CLK, "enet0_ipg_clk", "enet0_ipg_s_clk", 0, CONN_ENET_0_LPCG, 16, 0, }, 105 { IMX_CONN_LPCG_ENET1_ROOT_CLK, "enet1_ipg_root_clk", "enet1_clk", 0, CONN_ENET_1_LPCG, 0, 0, }, 106 { IMX_CONN_LPCG_ENET1_TX_CLK, "enet1_tx_clk", "enet1_clk", 0, CONN_ENET_1_LPCG, 4, 0, }, 107 { IMX_CONN_LPCG_ENET1_AHB_CLK, "enet1_ahb_clk", "conn_axi_clk_root", 0, CONN_ENET_1_LPCG, 8, 0, }, 108 { IMX_CONN_LPCG_ENET1_IPG_S_CLK, "enet1_ipg_s_clk", "conn_ipg_clk_root", 0, CONN_ENET_1_LPCG, 20, 0, }, 109 { IMX_CONN_LPCG_ENET1_IPG_CLK, "enet1_ipg_clk", "enet0_ipg_s_clk", 0, CONN_ENET_1_LPCG, 16, 0, }, 110 }; 111 112 static const struct imx8qxp_ss_lpcg imx8qxp_ss_conn = { 113 .lpcg = imx8qxp_lpcg_conn, 114 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_conn), 115 .num_max = IMX_CONN_LPCG_CLK_END, 116 }; 117 118 static const struct imx8qxp_lpcg_data imx8qxp_lpcg_lsio[] = { 119 { IMX_LSIO_LPCG_PWM0_IPG_CLK, "pwm0_lpcg_ipg_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 0, 0, }, 120 { IMX_LSIO_LPCG_PWM0_IPG_HF_CLK, "pwm0_lpcg_ipg_hf_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 4, 0, }, 121 { IMX_LSIO_LPCG_PWM0_IPG_S_CLK, "pwm0_lpcg_ipg_s_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 16, 0, }, 122 { IMX_LSIO_LPCG_PWM0_IPG_SLV_CLK, "pwm0_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_0_LPCG, 20, 0, }, 123 { IMX_LSIO_LPCG_PWM0_IPG_MSTR_CLK, "pwm0_lpcg_ipg_mstr_clk", "pwm0_clk", 0, LSIO_PWM_0_LPCG, 24, 0, }, 124 { IMX_LSIO_LPCG_PWM1_IPG_CLK, "pwm1_lpcg_ipg_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 0, 0, }, 125 { IMX_LSIO_LPCG_PWM1_IPG_HF_CLK, "pwm1_lpcg_ipg_hf_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 4, 0, }, 126 { IMX_LSIO_LPCG_PWM1_IPG_S_CLK, "pwm1_lpcg_ipg_s_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 16, 0, }, 127 { IMX_LSIO_LPCG_PWM1_IPG_SLV_CLK, "pwm1_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_1_LPCG, 20, 0, }, 128 { IMX_LSIO_LPCG_PWM1_IPG_MSTR_CLK, "pwm1_lpcg_ipg_mstr_clk", "pwm1_clk", 0, LSIO_PWM_1_LPCG, 24, 0, }, 129 { IMX_LSIO_LPCG_PWM2_IPG_CLK, "pwm2_lpcg_ipg_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 0, 0, }, 130 { IMX_LSIO_LPCG_PWM2_IPG_HF_CLK, "pwm2_lpcg_ipg_hf_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 4, 0, }, 131 { IMX_LSIO_LPCG_PWM2_IPG_S_CLK, "pwm2_lpcg_ipg_s_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 16, 0, }, 132 { IMX_LSIO_LPCG_PWM2_IPG_SLV_CLK, "pwm2_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_2_LPCG, 20, 0, }, 133 { IMX_LSIO_LPCG_PWM2_IPG_MSTR_CLK, "pwm2_lpcg_ipg_mstr_clk", "pwm2_clk", 0, LSIO_PWM_2_LPCG, 24, 0, }, 134 { IMX_LSIO_LPCG_PWM3_IPG_CLK, "pwm3_lpcg_ipg_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 0, 0, }, 135 { IMX_LSIO_LPCG_PWM3_IPG_HF_CLK, "pwm3_lpcg_ipg_hf_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 4, 0, }, 136 { IMX_LSIO_LPCG_PWM3_IPG_S_CLK, "pwm3_lpcg_ipg_s_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 16, 0, }, 137 { IMX_LSIO_LPCG_PWM3_IPG_SLV_CLK, "pwm3_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_3_LPCG, 20, 0, }, 138 { IMX_LSIO_LPCG_PWM3_IPG_MSTR_CLK, "pwm3_lpcg_ipg_mstr_clk", "pwm3_clk", 0, LSIO_PWM_3_LPCG, 24, 0, }, 139 { IMX_LSIO_LPCG_PWM4_IPG_CLK, "pwm4_lpcg_ipg_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 0, 0, }, 140 { IMX_LSIO_LPCG_PWM4_IPG_HF_CLK, "pwm4_lpcg_ipg_hf_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 4, 0, }, 141 { IMX_LSIO_LPCG_PWM4_IPG_S_CLK, "pwm4_lpcg_ipg_s_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 16, 0, }, 142 { IMX_LSIO_LPCG_PWM4_IPG_SLV_CLK, "pwm4_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_4_LPCG, 20, 0, }, 143 { IMX_LSIO_LPCG_PWM4_IPG_MSTR_CLK, "pwm4_lpcg_ipg_mstr_clk", "pwm4_clk", 0, LSIO_PWM_4_LPCG, 24, 0, }, 144 { IMX_LSIO_LPCG_PWM5_IPG_CLK, "pwm5_lpcg_ipg_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 0, 0, }, 145 { IMX_LSIO_LPCG_PWM5_IPG_HF_CLK, "pwm5_lpcg_ipg_hf_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 4, 0, }, 146 { IMX_LSIO_LPCG_PWM5_IPG_S_CLK, "pwm5_lpcg_ipg_s_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 16, 0, }, 147 { IMX_LSIO_LPCG_PWM5_IPG_SLV_CLK, "pwm5_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_5_LPCG, 20, 0, }, 148 { IMX_LSIO_LPCG_PWM5_IPG_MSTR_CLK, "pwm5_lpcg_ipg_mstr_clk", "pwm5_clk", 0, LSIO_PWM_5_LPCG, 24, 0, }, 149 { IMX_LSIO_LPCG_PWM6_IPG_CLK, "pwm6_lpcg_ipg_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 0, 0, }, 150 { IMX_LSIO_LPCG_PWM6_IPG_HF_CLK, "pwm6_lpcg_ipg_hf_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 4, 0, }, 151 { IMX_LSIO_LPCG_PWM6_IPG_S_CLK, "pwm6_lpcg_ipg_s_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 16, 0, }, 152 { IMX_LSIO_LPCG_PWM6_IPG_SLV_CLK, "pwm6_lpcg_ipg_slv_clk", "lsio_bus_clk_root", 0, LSIO_PWM_6_LPCG, 20, 0, }, 153 { IMX_LSIO_LPCG_PWM6_IPG_MSTR_CLK, "pwm6_lpcg_ipg_mstr_clk", "pwm6_clk", 0, LSIO_PWM_6_LPCG, 24, 0, }, 154 }; 155 156 static const struct imx8qxp_ss_lpcg imx8qxp_ss_lsio = { 157 .lpcg = imx8qxp_lpcg_lsio, 158 .num_lpcg = ARRAY_SIZE(imx8qxp_lpcg_lsio), 159 .num_max = IMX_LSIO_LPCG_CLK_END, 160 }; 161 162 #define IMX_LPCG_MAX_CLKS 8 163 164 static struct clk_hw *imx_lpcg_of_clk_src_get(struct of_phandle_args *clkspec, 165 void *data) 166 { 167 struct clk_hw_onecell_data *hw_data = data; 168 unsigned int idx = clkspec->args[0] / 4; 169 170 if (idx >= hw_data->num) { 171 pr_err("%s: invalid index %u\n", __func__, idx); 172 return ERR_PTR(-EINVAL); 173 } 174 175 return hw_data->hws[idx]; 176 } 177 178 static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev, 179 struct device_node *np) 180 { 181 const char *output_names[IMX_LPCG_MAX_CLKS]; 182 const char *parent_names[IMX_LPCG_MAX_CLKS]; 183 unsigned int bit_offset[IMX_LPCG_MAX_CLKS]; 184 struct clk_hw_onecell_data *clk_data; 185 struct clk_hw **clk_hws; 186 struct resource *res; 187 void __iomem *base; 188 int count; 189 int idx; 190 int ret; 191 int i; 192 193 if (!of_device_is_compatible(np, "fsl,imx8qxp-lpcg")) 194 return -EINVAL; 195 196 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 197 base = devm_ioremap_resource(&pdev->dev, res); 198 if (IS_ERR(base)) 199 return PTR_ERR(base); 200 201 count = of_property_count_u32_elems(np, "clock-indices"); 202 if (count < 0) { 203 dev_err(&pdev->dev, "failed to count clocks\n"); 204 return -EINVAL; 205 } 206 207 /* 208 * A trick here is that we set the num of clks to the MAX instead 209 * of the count from clock-indices because one LPCG supports up to 210 * 8 clock outputs which each of them is fixed to 4 bits. Then we can 211 * easily get the clock by clk-indices (bit-offset) / 4. 212 * And the cost is very limited few pointers. 213 */ 214 215 clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws, 216 IMX_LPCG_MAX_CLKS), GFP_KERNEL); 217 if (!clk_data) 218 return -ENOMEM; 219 220 clk_data->num = IMX_LPCG_MAX_CLKS; 221 clk_hws = clk_data->hws; 222 223 ret = of_property_read_u32_array(np, "clock-indices", bit_offset, 224 count); 225 if (ret < 0) { 226 dev_err(&pdev->dev, "failed to read clock-indices\n"); 227 return -EINVAL; 228 } 229 230 ret = of_clk_parent_fill(np, parent_names, count); 231 if (ret != count) { 232 dev_err(&pdev->dev, "failed to get clock parent names\n"); 233 return count; 234 } 235 236 ret = of_property_read_string_array(np, "clock-output-names", 237 output_names, count); 238 if (ret != count) { 239 dev_err(&pdev->dev, "failed to read clock-output-names\n"); 240 return -EINVAL; 241 } 242 243 pm_runtime_get_noresume(&pdev->dev); 244 pm_runtime_set_active(&pdev->dev); 245 pm_runtime_set_autosuspend_delay(&pdev->dev, 500); 246 pm_runtime_use_autosuspend(&pdev->dev); 247 pm_runtime_enable(&pdev->dev); 248 249 for (i = 0; i < count; i++) { 250 idx = bit_offset[i] / 4; 251 if (idx > IMX_LPCG_MAX_CLKS) { 252 dev_warn(&pdev->dev, "invalid bit offset of clock %d\n", 253 i); 254 ret = -EINVAL; 255 goto unreg; 256 } 257 258 clk_hws[idx] = imx_clk_lpcg_scu_dev(&pdev->dev, output_names[i], 259 parent_names[i], 0, base, 260 bit_offset[i], false); 261 if (IS_ERR(clk_hws[idx])) { 262 dev_warn(&pdev->dev, "failed to register clock %d\n", 263 idx); 264 ret = PTR_ERR(clk_hws[idx]); 265 goto unreg; 266 } 267 } 268 269 ret = devm_of_clk_add_hw_provider(&pdev->dev, imx_lpcg_of_clk_src_get, 270 clk_data); 271 if (ret) 272 goto unreg; 273 274 pm_runtime_mark_last_busy(&pdev->dev); 275 pm_runtime_put_autosuspend(&pdev->dev); 276 277 return 0; 278 279 unreg: 280 while (--i >= 0) { 281 idx = bit_offset[i] / 4; 282 if (clk_hws[idx]) 283 imx_clk_lpcg_scu_unregister(clk_hws[idx]); 284 } 285 286 pm_runtime_disable(&pdev->dev); 287 288 return ret; 289 } 290 291 static int imx8qxp_lpcg_clk_probe(struct platform_device *pdev) 292 { 293 struct device *dev = &pdev->dev; 294 struct device_node *np = dev->of_node; 295 struct clk_hw_onecell_data *clk_data; 296 const struct imx8qxp_ss_lpcg *ss_lpcg; 297 const struct imx8qxp_lpcg_data *lpcg; 298 struct resource *res; 299 struct clk_hw **clks; 300 void __iomem *base; 301 int ret; 302 int i; 303 304 /* try new binding to parse clocks from device tree first */ 305 ret = imx_lpcg_parse_clks_from_dt(pdev, np); 306 if (!ret) 307 return 0; 308 309 ss_lpcg = of_device_get_match_data(dev); 310 if (!ss_lpcg) 311 return -ENODEV; 312 313 /* 314 * Please don't replace this with devm_platform_ioremap_resource. 315 * 316 * devm_platform_ioremap_resource calls devm_ioremap_resource which 317 * differs from devm_ioremap by also calling devm_request_mem_region 318 * and preventing other mappings in the same area. 319 * 320 * On imx8 the LPCG nodes map entire subsystems and overlap 321 * peripherals, this means that using devm_platform_ioremap_resource 322 * will cause many devices to fail to probe including serial ports. 323 */ 324 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 325 if (!res) 326 return -EINVAL; 327 base = devm_ioremap(dev, res->start, resource_size(res)); 328 if (!base) 329 return -ENOMEM; 330 331 clk_data = devm_kzalloc(&pdev->dev, struct_size(clk_data, hws, 332 ss_lpcg->num_max), GFP_KERNEL); 333 if (!clk_data) 334 return -ENOMEM; 335 336 clk_data->num = ss_lpcg->num_max; 337 clks = clk_data->hws; 338 339 for (i = 0; i < ss_lpcg->num_lpcg; i++) { 340 lpcg = ss_lpcg->lpcg + i; 341 clks[lpcg->id] = imx_clk_lpcg_scu(lpcg->name, lpcg->parent, 342 lpcg->flags, base + lpcg->offset, 343 lpcg->bit_idx, lpcg->hw_gate); 344 } 345 346 for (i = 0; i < clk_data->num; i++) { 347 if (IS_ERR(clks[i])) 348 pr_warn("i.MX clk %u: register failed with %ld\n", 349 i, PTR_ERR(clks[i])); 350 } 351 352 return of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data); 353 } 354 355 static const struct of_device_id imx8qxp_lpcg_match[] = { 356 { .compatible = "fsl,imx8qxp-lpcg-adma", &imx8qxp_ss_adma, }, 357 { .compatible = "fsl,imx8qxp-lpcg-conn", &imx8qxp_ss_conn, }, 358 { .compatible = "fsl,imx8qxp-lpcg-lsio", &imx8qxp_ss_lsio, }, 359 { .compatible = "fsl,imx8qxp-lpcg", NULL }, 360 { /* sentinel */ } 361 }; 362 363 static struct platform_driver imx8qxp_lpcg_clk_driver = { 364 .driver = { 365 .name = "imx8qxp-lpcg-clk", 366 .of_match_table = imx8qxp_lpcg_match, 367 .pm = &imx_clk_lpcg_scu_pm_ops, 368 .suppress_bind_attrs = true, 369 }, 370 .probe = imx8qxp_lpcg_clk_probe, 371 }; 372 373 builtin_platform_driver(imx8qxp_lpcg_clk_driver); 374 375 MODULE_AUTHOR("Aisheng Dong <aisheng.dong@nxp.com>"); 376 MODULE_DESCRIPTION("NXP i.MX8QXP LPCG clock driver"); 377 MODULE_LICENSE("GPL v2"); 378